DCF77
T
IME
C
ODE
C
LOCKS
7406RC Slave Clock Control Board for System 7001RC - V02.03
9 / 27
hopf
Elektronik GmbH
Nottebohmstr. 41 • D-58511 Lüdenscheid • Tel.: +49 (0)2351 9386-86 • Fax: +49 (0)2351 9386-93 • Internet: http://www.hopf.com • E-Mail: [email protected]
3
DCF77 Time Code Clocks
In DCF77 time code
operation, lines transmit a DCF77 time code signal, changing pole on
every second change. The DCF77 time code signal is coded according to the period of the
zero volt position, 100msec (= logic 0) and 200msec (= logic 1).
Pulse form for DCF77 time code clocks
1 sec
1 sec
1 sec
1 sec
1 sec
100 msec
200 msec
+U
ext
-U
ext
0V
